Question

Cold working is generally carried out __________

(a) Below melting point

(b) Above recrystallization temperature

(c) At room temperature

(d) Cryogenic temperature

This question was posed to me in a national level competition.

I would like to ask this question from Cryogenics, Hot and Cold Working of Metals topic in chapter Mechanical Working Processes & Phase Transformations of Engineering Material & Metallurgy

Answer 1

Right option is (c) At room temperature

Explanation: Cold working is defined as the plastic deformation of a material which results in strain hardening. It usually occurs at room temperature. Hot working is generally carried out above recrystallization temperature but below its melting point.